package com.pinfly.purchasecharge.service.utils;

import java.util.Random;

import org.apache.log4j.Logger;

public class PinYinUtil
{
    private static final Logger LOGGER = Logger.getLogger (PinYinUtil.class);

    /**
     * 返回首字母
     * 
     * @param strChinese
     * @param bUpCase
     * @return
     */
    public static String getFirstSpell (String strChinese, boolean bUpCase)
    {
        try
        {
            StringBuffer buffer = new StringBuffer ();
            byte b[] = strChinese.getBytes ("GBK");// 把中文转化成byte数组

            for (int i = 0; i < b.length; i++)
            {
                if ((b[i] & 255) > 128)
                {
                    int char1 = b[i++] & 255;

                    char1 <<= 8;// 左移运算符用“<<”表示，是将运算符左边的对象，向左移动运算符右边指定的位数，并且在低位补零。其实，向左移n位，就相当于乘上2的n次方

                    int chart = char1 + (b[i] & 255);

                    buffer.append (getFirstSpellChar ((char) chart, bUpCase));
                    continue;
                }

                char c = (char) b[i];
                if (!Character.isJavaIdentifierPart (c))// 确定指定字符是否可以是
                                                        // Java,标识符中首字符以外的部分
                    c = '0';

                buffer.append (c);
            }
            return buffer.toString ();
        }
        catch (Exception e)
        {
            LOGGER.warn ("\u53D6\u4E2D\u6587\u62FC\u97F3\u6709\u9519" + e.getMessage ());
        }
        return null;
    }

    /**
     * 得到首字母
     * 
     * @param strChinese
     * @param bUpCase
     * @return
     */
    private static char getFirstSpellChar (char strChinese, boolean bUpCase)
    {
        int charGBK = strChinese;
        char result;
        if (charGBK >= 45217 && charGBK <= 45252)
            result = 'A';

        else if (charGBK >= 45253 && charGBK <= 45760)
            result = 'B';

        else if (charGBK >= 45761 && charGBK <= 46317)
            result = 'C';

        else if (charGBK >= 46318 && charGBK <= 46825)
            result = 'D';

        else if (charGBK >= 46826 && charGBK <= 47009)
            result = 'E';

        else if (charGBK >= 47010 && charGBK <= 47296)
            result = 'F';

        else if (charGBK >= 47297 && charGBK <= 47613)
            result = 'G';

        else if (charGBK >= 47614 && charGBK <= 48118)
            result = 'H';

        else if (charGBK >= 48119 && charGBK <= 49061)
            result = 'J';

        else if (charGBK >= 49062 && charGBK <= 49323)
            result = 'K';

        else if (charGBK >= 49324 && charGBK <= 49895)
            result = 'L';

        else if (charGBK >= 49896 && charGBK <= 50370)
            result = 'M';

        else if (charGBK >= 50371 && charGBK <= 50613)
            result = 'N';

        else if (charGBK >= 50614 && charGBK <= 50621)
            result = 'O';

        else if (charGBK >= 50622 && charGBK <= 50905)
            result = 'P';

        else if (charGBK >= 50906 && charGBK <= 51386)
            result = 'Q';

        else if (charGBK >= 51387 && charGBK <= 51445)
            result = 'R';

        else if (charGBK >= 51446 && charGBK <= 52217)
            result = 'S';

        else if (charGBK >= 52218 && charGBK <= 52697)
            result = 'T';

        else if (charGBK >= 52698 && charGBK <= 52979)
            result = 'W';

        else if (charGBK >= 52980 && charGBK <= 53688)
            result = 'X';

        else if (charGBK >= 53689 && charGBK <= 54480)
            result = 'Y';

        else if (charGBK >= 54481 && charGBK <= 55289)
            result = 'Z';

        else
            result = (char) (65 + (new Random ()).nextInt (25));

        if (!bUpCase)
            result = Character.toLowerCase (result);

        return result;
    }
}
